Struct rustc_span::hygiene::ExpnId

pub struct ExpnId(u32);

A unique ID associated with a macro invocation and expansion.

Implementations

impl ExpnId

pub fn fresh(expn_data: Option<ExpnData>) -> Self

pub fn root() -> Self

The ID of the theoretical expansion that generates freshly parsed, unexpanded AST.

pub fn as_u32(self) -> u32

pub fn from_u32(raw: u32) -> ExpnId

pub fn expn_data(self) -> ExpnData

pub fn set_expn_data(self, expn_data: ExpnData)

pub fn is_descendant_of(self, ancestor: ExpnId) -> bool

pub fn outer_expn_is_descendant_of(self, ctxt: SyntaxContext) -> bool

expn_id.outer_expn_is_descendant_of(ctxt) is equivalent to but faster than expn_id.is_descendant_of(ctxt.outer_expn()).

pub fn expansion_cause(self) -> Option<Span>

Returns span for the macro which originally caused this expansion to happen.

Stops backtracing at include! boundary.

Trait Implementations

impl Clone for ExpnId

fn clone(&self) -> ExpnId

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ExpnId

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<D: Decoder> Decodable<D> for ExpnId

default fn decode(_: &mut D) -> Result<Self, D::Error>

impl<E: Encoder> Encodable<E> for ExpnId

default fn encode(&self, _: &mut E) -> Result<(), E::Error>

impl Hash for ExpnId

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl<CTX: HashStableContext> HashStable<CTX> for ExpnId

fn hash_stable(&self, ctx: &mut CTX, hasher: &mut StableHasher)

impl PartialEq<ExpnId> for ExpnId

fn eq(&self, other: &ExpnId) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &ExpnId) -> bool

This method tests for !=.

impl Copy for ExpnId

impl Eq for ExpnId

impl StructuralEq for ExpnId

impl StructuralPartialEq for ExpnId